High-performance supercapacitor based on V2O5/carbon nanotubes-super activated carbon ternary composite |
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| Affiliation: | 1. Faculty of Physics, Mahalingam College of Engineering and Technology, Pollachi, Tamilnadu, India;2. Faculty of Physics, TRP Engineering College (SRM Group), Irungalur, Trichy, Tamilnadu, India;3. Department of Physics, Gandhigram Rural University, Gandhigram, Tamilnadu, India;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China;2. Institute of Solid State Chemistry, Ural Division, Russian Academy of Science, Pervomaiskaya ul. 91, Yekaterinburg, 620219, Russia |
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| Abstract: | A ternary composite of V2O5/carbon nanotubes/super activated carbon (V2O5/CNTs–SAC) was prepared by a simple hydrothermal method and used as a supercapacitor electrode material. The electrochemical performance of the electrode was analyzed using cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy, which were performed in 2 M NaNO3 as the electrolyte. The V2O5/CNTs–SAC nanocomposite exhibited a specific capacitance as high as 357.5 F g−1 at a current density of 10 A g−1, which is much higher than that of either bare V2O5 nanosheets or a V2O5/CNTs composite. Furthermore, the capacitance increased to 128.7% of the initial value after 200 cycles, with 99.5% of the maximum value being retained after 1000 cycles. These results demonstrated that the V2O5/CNTs–SAC ternary composite is suitable for use as an electrode material for supercapacitors. |
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| Keywords: | Supercapacitor Carbon nanotubes Super activated carbon |
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